NAPHTHALENE QUENCHING OF BENZOPHENONE SENSITIZED REACTIONS OF PENTACYANONITROSYLFERRATE (II), [FE(CN)5NO]2-

The tide investigation is reported under conditions either favourable to energy transfer from 3BP (benzophenone) to pentacyanonitrosylferrat e(II), (NP), which gives [Fe(CN)5CH3OH]2-, (LSP), or hydrogen abstract ion by 3BP from propane-2-ol which gives [Fe(CN)4NO]2-, (TNF). In the former system naphthalene (NA) quenches the reaction up to its concent ration < 1.0 x 10(-2) mol dm-3 beyond which phi(LSP) (0.12) is constan t. In the latter system NA completely quenches the formation of TNF wi th a concomitant increase in phi(LSP). The experimental data which is consistent with the proposed mechanism supports the quenching of 3BP a nd subsequent energy transfer from the resulting 3NA to NP.